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ElementUI的Table组件行合并 ，示例用官网vue3版的文档

<el-table :data="tableData" :span-method="objectSpanMethod" border style="width: 100%; margin-top: 20px"><el-table-column prop="id" label="ID" width="180" /><el-table-column prop="name" label="姓名" /><el-table-column prop="amount1" label="数值 1（元）" /><el-table-column prop="amount2" label="数值 2（元）" /><el-table-column prop="amount3" label="数值 3（元）" />
</el-table>

export default {data() {return {tableData: [{id: '12987122',name: '王小虎',amount1: '234',amount2: '3.2',amount3: 10,},{id: '12987123',name: '王小虎',amount1: '165',amount2: '4.43',amount3: 12,},{id: '12987124',name: '王小虎',amount1: '324',amount2: '1.9',amount3: 9,},{id: '12987125',name: '王小虎',amount1: '621',amount2: '2.2',amount3: 17,},{id: '12987126',name: '王小虎',amount1: '539',amount2: '4.1',amount3: 15,},{id: '12987126',name: '王小虎',amount1: '539',amount2: '4.1',amount3: 15,},{id: '12987126',name: '王小虎',amount1: '539',amount2: '4.1',amount3: 15,},{id: '12987126',name: '王小虎',amount1: '539',amount2: '4.1',amount3: 15,},{id: '12987126',name: '王小虎',amount1: '539',amount2: '4.1',amount3: 15,},{id: '12987126',name: '王小虎',amount1: '539',amount2: '4.1',amount3: 15,},{id: '12987126',name: '王小虎',amount1: '539',amount2: '4.1',amount3: 15,},],// 用于行合并的数组，那就要在某一列下使用，此例子用于第一、二列// 每个元素是一行，0标识要隐藏第一列，非0数字标识此行要合并的行数spanArr: [3, 0, 0, 2, 0, 2, 0, 1, 3, 0], // 比如开头的3,0,0 从第一行开始合并3行，隐藏第二三行的第一列spanArr2: [2, 0, 1, 1, 1, 2, 0, 1, 1, 2],};},methods: {// 行合并范例objectSpanMethod({ row, column, rowIndex, columnIndex }) {// 处理第一列if (columnIndex === 0) {let _row = this.spanArr[rowIndex];let _col = _row > 0 ? 1 : 0; // 0表示隐藏return {rowspan: _row,colspan: _col,};}// 处理第二列if (columnIndex === 1) {let _row = this.spanArr2[rowIndex];let _col = _row > 0 ? 1 : 0; // 0表示隐藏return {rowspan: _row,colspan: _col,};}},},
};

效果：